139349664 has 36 divisors (see below), whose sum is σ = 396276426. Its totient is φ = 46449792.

The previous prime is 139349657. The next prime is 139349671. The reversal of 139349664 is 466943931.

139349664 is a `hidden beast` number, since 13 + 93 + 496 + 64 = 666.

It is an interprime number because it is at equal distance from previous prime (139349657) and next prime (139349671).

It can be written as a sum of positive squares in only one way, i.e., 134096400 + 5253264 = 11580^2 + 2292^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 241639 + ... + 242214.

Almost surely, 2^139349664 is an apocalyptic number.

It is an amenable number.

139349664 is an abundant number, since it is smaller than the sum of its proper divisors (256926762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139349664 is a wasteful number, since it uses less digits than its factorization.

139349664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483869 (or 483858 counting only the distinct ones).

The product of its digits is 419904, while the sum is 45.

The square root of 139349664 is about 11804.6458650821. The cubic root of 139349664 is about 518.4441463319. Note that the first 3 decimals are identical.

The spelling of 139349664 in words is "one hundred thirty-nine million, three hundred forty-nine thousand, six hundred sixty-four".